How did the Roman province develop as an administrative unit, and what influence did it have on Roman politics? The nature of the Roman provinces changed near the end of the 3rd century when Diocletian introduced the Tetrarchy. The emperor Caracalla granted blanket citizenship to all free men living within the Roman Empire in 212 CE. List of Roman Provinces Under TrajanMap of the Ancient Roman Empire at Its Peak (117 CE). Source: TheCollector.comAt the death of Trajan in 117 CE, there were 40 Roman provinces, excluding the eleven Italian provinces.

Source: The North Africa Journal January 22, 2026 14:59 UTC